package com.luojie.service.impl;

import com.alibaba.fastjson.JSONObject;
import com.luojie.constant.MessageConstant;
import com.luojie.dto.UserLoginDTO;
import com.luojie.exception.LoginFailedException;
import com.luojie.mapper.UserMapper;
import com.luojie.po.User;
import com.luojie.properties.WeChatProperties;
import com.luojie.service.UserService;
import com.luojie.utils.HttpClientUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Slf4j
@Service
public class UserServiceImpl implements UserService {
    public static final String WX_LOGIN = "https://api.weixin.qq.com/sns/jscode2session";
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WeChatProperties weChatProperties;
    @Override
    public User WxLongin(UserLoginDTO userLoginDTO) {
       //调用微信接口服务，获得当前微信用户的openid
        String openid = getOpenid(userLoginDTO.getCode());


        //判断openid是否为空 如果为空表示登录失败 ，抛出业务异常
        if (openid == null) {
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);

        }

        //判断当前用户是否为新用户
        User user = userMapper.getByOpenid(openid);

        //如果是新用户自动完成注册‘
        if (user == null) {

            user = user.builder().openid(openid).createTime(LocalDateTime.now()).build();
            userMapper.insert(user);
        }
        //返回这个用户对象
        return user;
    }
    /**
     * 调用微信接口服务，获取微信用户的OPENID
     *
     * @param code
     * @return
     */
    private String getOpenid(String code) {
        Map<String, String> map = new HashMap<>();
        map.put("appid", weChatProperties.getAppid());
        map.put("secret", weChatProperties.getSecret());
        map.put("js_code", code);
        map.put("grant_type", "authorization_code");
        String json = HttpClientUtil.doGet(WX_LOGIN, map);

        JSONObject jsonObject = JSONObject.parseObject(json);
        String openid = jsonObject.getString("openid");
        return openid;

    }
}
